Ubuntu 20.04 LTS:Linux 内核漏洞 (USN-5091-1)

high Nessus 插件 ID 153769

简介

远程 Ubuntu 主机缺少一个或多个安全更新。

描述

远程 Ubuntu 20.04 LTS 主机上安装的程序包受到 USN-5091-1 公告中提及的多个漏洞的影响。

- 在 5.14-rc3 之前版本的 Linux 内核跟踪模块功能中,发现用户跟踪环形缓冲区的特定方式中缺少 CPU 资源。仅取得特权的本地用户(通过 CAP_SYS_ADMIN 功能)可利用此缺陷来耗尽资源,从而造成拒绝服务。
(CVE-2021-3679)

- 在 Linux 内核 5.12.13 之前版本的 kernel/bpf/verifier.c 中,可能会错误地预测分支(例如,由于类型混淆),因此非特权 BPF 程序可以通过边信道攻击读取任意内存位置,亦称 CID-9183671af6db。(CVE-2021-33624)

- 在 powerpc 平台上 Linux 内核 5.13.5 及之前版本中,KVM 客户机操作系统用户可利用 arch/powerpc/kvm/book3s_rtas.c,通过 rtas_args.nargs,造成主机操作系统内存损坏,亦即 CID-f62f3c20647e。(CVE-2021-37576)

- **存在争议** 在 Linux 内核 5.13.4 之前版本的 drivers/char/virtio_console.c 中,不受信任的设备提供超过缓冲区大小的 buf->len 值时可以触发数据损坏或丢失。注意:
供应商表示,引用的数据损坏在任何现有用例中都属于漏洞;添加长度验证只是为了在面对主机 OS 异常行为时保持稳定。
(CVE-2021-38160)

- 在 5.13.4 之前版本的 Linux 内核中,fs/nfs/nfs4client.c 存在 connection-setup 排序错误问题,远程 NFSv4 服务器的操作员可以通过特殊安排,使这些服务器在中继检测期间不可访问,以造成拒绝服务(挂载挂载)。(CVE-2021-38199)

- 在 5.13.6 之前版本的 Linux 内核中,drivers/usb/host/max3421-hcd.c 允许实际邻近的攻击者在某些情况下,通过删除 MAX-3421 USB 设备来造成拒绝服务(释放后使用和错误)。(CVE-2021-38204)

请注意,Nessus 尚未测试此问题,而是只依靠应用程序自我报告的版本号来判断。

解决方案

更新受影响的程序包。

另见

https://ubuntu.com/security/notices/USN-5091-1

插件详情

严重性: High

ID: 153769

文件名: ubuntu_USN-5091-1.nasl

版本: 1.2

类型: local

代理: unix

发布时间: 2021/9/28

最近更新时间: 2021/9/28

支持的传感器: Frictionless Assessment Agent, Frictionless Assessment AWS, Frictionless Assessment Azure, Nessus Agent

风险信息

VPR

风险因素: Medium

分数: 6.7

CVSS v2

风险因素: High

基本分数: 7.2

时间分数: 5.3

矢量: AV:L/AC:L/Au:N/C:C/I:C/A:C

时间矢量: E:U/RL:OF/RC:C

CVSS 分数来源: CVE-2021-38160

CVSS v3

风险因素: High

基本分数: 7.8

时间分数: 6.8

矢量: CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

时间矢量: E:U/RL:O/RC:C

漏洞信息

CPE: cpe:/o:canonical:ubuntu_linux:20.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:linux-aws-cloud-tools-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-aws-headers-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-aws-tools-5.4.0-1057, p-cpe:/a:canonical:ubuntu_linux:linux-azure-cloud-tools-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-azure-headers-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-azure-tools-5.4.0-1059, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-buildinfo-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-common, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-cloud-tools-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-crashdump, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-headers-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-gcp-tools-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-generic, p-cpe:/a:canonical:ubuntu_linux:linux-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-gke, p-cpe:/a:canonical:ubuntu_linux:linux-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-gke-headers-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gke-tools-5.4.0-1053, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-cloud-tools-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-headers-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-source-5.4.0, p-cpe:/a:canonical:ubuntu_linux:linux-gkeop-tools-5.4.0-1024, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-headers-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-headers-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gke, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-headers-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-headers-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oem, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-headers-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-headers-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-extra-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-image-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem, p-cpe:/a:canonical:ubuntu_linux:linux-image-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-image-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-image-unsigned-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-image-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-kvm-headers-5.4.0-1047, p-cpe:/a:canonical:ubuntu_linux:linux-kvm-tools-5.4.0-1047, p-cpe:/a:canonical:ubuntu_linux:linux-libc-dev, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-modules-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gke, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-modules-extra-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-oem, p-cpe:/a:canonical:ubuntu_linux:linux-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-oem-osp1-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-oem-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-headers-5.4.0-1055, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-oracle-tools-5.4.0-1055, p-cpe:/a:canonical:ubuntu_linux:linux-source, p-cpe:/a:canonical:ubuntu_linux:linux-source-5.4.0, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1024-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1047-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1053-gcp, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1053-gke, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1055-oracle, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1057-aws, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-1059-azure, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-generic, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-tools-5.4.0-88-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-tools-aws-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-azure-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-common, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gcp-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-generic-lpae-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gke, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gke-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gkeop, p-cpe:/a:canonical:ubuntu_linux:linux-tools-gkeop-5.4, p-cpe:/a:canonical:ubuntu_linux:linux-tools-host, p-cpe:/a:canonical:ubuntu_linux:linux-tools-kvm, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-lowlatency-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oem, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oem-osp1, p-cpe:/a:canonical:ubuntu_linux:linux-tools-oracle-lts-20.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-tools-virtual-hwe-18.04-edge, p-cpe:/a:canonical:ubuntu_linux:linux-virtual, p-cpe:/a:canonical:ubuntu_linux:linux-virtual-hwe-18.04, p-cpe:/a:canonical:ubuntu_linux:linux-virtual-hwe-18.04-edge

必需的 KB 项: Host/cpu, Host/Ubuntu, Host/Ubuntu/release, Host/Debian/dpkg-l

易利用性: No known exploits are available

补丁发布日期: 2021/9/28

漏洞发布日期: 2021/6/23

参考资料信息

CVE: CVE-2021-3679, CVE-2021-33624, CVE-2021-37576, CVE-2021-38160, CVE-2021-38199, CVE-2021-38204

USN: 5091-1